On Thursday night, Facebook was attacked by hackers for the fourth time this month. Who is behind the attacks isn't known, but the malefactors appear to be using several old tricks—phishing, malware downloads, and other conceits—to get people to give up their Facebook password credentials, or trick them into buying things from suspect e-commerce sites.

On Thursday night, Facebook was attacked by hackers for the fourth time this month. Who is behind the attacks isn't known, but the malefactors appear to be using several old tricks—phishing, malware downloads, and other conceits—to get people to give up their Facebook password credentials, or trick them into buying things from suspect e-commerce sites.